Rocker side bearing.



J. F. OCONNOR.

ROCKER SIDE BEARING.

APPLICATION man FEB. 26, 1917.

Patented June 11, 1918.

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Be it known that 1, JOHN F. OCoNnoR, a citizen of the United States, residing at; Chicago-,in the county of Cook and Seats of Illinois; have invented a certain new and ilseful ilinprovement in Rocker Side Bearings of i which the following is a full clear,

concise, and exact description, reference ing 'had, to the accompanying ailiawiirigs',

forming a partof this specification.

". This "invention relates to improvements in fockerxside bearings.

Ono. object-o1 the invention is to provide a rocker side bearing of simple and efii-cientconstruction and so arranged that the rocker, wl'n'cl m loosely seal-ed within a housing, is i'etiirned'to normal posit on after each aciniw tion, uedei." the influence of gravity, the

Provided With-means positively the return of the rocker to proper p'e'si on aftereach movement.

vent-ion. fnrthermoreeonsists in the *c'vcments in the parts and devices and in the novel cozzibiziations of the fiaits and devices. heiein shown, described or claimed. #In the drawing forming a pm of this specification, Figure 1 is an end elevation of portions oi. 'a bmly'and truck bolster of ear, showing my improvements applied 3% iliei'eto'. "I g. 2 IS an enlarged vertical sec-- tionalview f f the side'loeai-ing proper and takensubscmitislly on 1. Figs. 3 and 4 are'ti'ansverse vertical seetlOIlzl-ltVlQWS of the side bearing and sakes on Hie lines3'3 and 47-4 respectively of Fig. 2. And Fig.5 is aview similar so Fig. 3 illustrating a different embodiment of the invention.

Eefer ing first to the structure as illuse91 tratediin F 1, 2, 3 and 4;, 10 denotes a body bolster of a car to which is pivotally connected in the usual manner a truck bolsier 11. The body bolster, on each' side of the king-pin, is provided with a bearing sun face 12 and the improved side b2 fiJZTlI1g;(l9/Slg" nets-d generally by the reference A, is erably applied to the truck bolster.

The side bearing A, as shown in the drawing, comprises a base casting or housing so and rocker C loosely mounted thereiri. The housing; B is provided a lower Wall 13 having lateral. extensions ii if the line 2-2 01 Fig r ,pecifieei ion of Eeiters Patent. Papfignfiqgg} J ng ii, 39315, Application aieiisebmm es, 191?.

Serial H0. 151,004.

which it is riveted to the bolster, oppositely curved end Walls 15-45 and parallel side Walls The oaseof the casfiing is cut away, as indicated as 1?, to receive combined Wear and bearing plates 18-18, the latter being inserted through a-suitable recess 19 in one of the end Walls, the plates being held in by any suitable means such as the pin or key. 20. The rocker C is of sub stantially polygonal form and comprises three series of opposed oonce'ntrio bearing surfaces 21 and 121. Each of the bearing surfaces 21 isrelatively small and is struck on a short radius, Whereas the corresponding opposed bearing surface 121 is nuioh longer and struck on a longer radius but from the same cew'uer. Each bearing surface 2-1 is disposed between a pair of bearing surfaces 121. and merges with the latter that the rocker may be said to be of substantially triangular form. By making the opposed bearing suifaces concentric, as above described, ii; is"

apparent that; as the rocker is moved or rolled from normal position, the vertical plate 18 will remain constant. At each end, the rocker C is provided with an extension or lug 22, iihe seine being formed with. three inwardly extending ci'irved surfaces 1E52-l22 and three outwardly extending curved surfaces 123, the projeotions being" also ofsubstantially triangular shape ,lmt with the horizontal side of the triangle uppermost whereas the con-esponding side of the rocker C is lowermost, in normal po'sifiion of the Paris The side walls iii-16 of the housing are cash provided with a ledge or guiding shelf 24, the cur/shire of the latter being eetermined so as to correspond Witlitlie vai'ious posif-icns of the inwardly extending curved surfaces 12:2 of the projection 22.. In other Woi'ds, the guiding ledge 24' may be said to be generated in the manner of a eycloid bee instead of using a point, the two lowermost arsenal-e surfaces 122 of e lugs 22 are used. e

The normal position of the parts is as shown in Fig. 2. Upon relasive movement- 'beizween the be t-ere, the rocker C will he rolled to either end of the housing and the curved end, walls 15 of the latter: will S61?! llll ass

as limiting stops for the rocker, as indicated by the dotted. position out the rocker in Fig. As the rocker moves to either side of'its normal position, it Will he apparout that the lugs 22 will then assume a po sitionof unstable equilibrium so thatsaid lugs 'vvill act as eccentric Weights on the rocker C insure the return of the latter to normal position. under the influence of gravity, Not only do the lugs 22 serve the function above described, but the same in conjunction with the guiding-andpositioning curved ledges 24, will positively insure the proper positioning of the rocker when it is returned to normal since the relation between the surfaces of the lugs 22 and the ledges 24- is such as to positively determine the position of the rocker C at any point in the rolling movement of the" latter relatively to the base casting. In order to prevent any binding of the parts, a slight clearance is permitted between the lugs 22 and the ledges 24 but aside from this permissible clearance, the position of the rocker is positively determined relatively to the base casting or housing; at all times.

On their inner faces at the center thereof, each of the side walls 16 may he provided with inwardly extending projection 25 so as to prevent accidental disengagement of the rocker from the housing when the partsare in normal position. The rocker is inserted and removed from the housing when the lugs 22 are to one side of the projections 25, or, as indicated in the dotted position in 2, wherein. the rocker may he removed. by lifting the same vertically. The side Walls of the housing may also he recessed, as indicated at 26, to prevent the accumulation of dirt or other foreign matter in the bottom of the side hearing,

In the construction illustrated in Fig. 5, the arrangement of the parts is the same as illustrated in the other figures except that detachable pin 52 is passed through the center of the rocker and engages in suitable grooves 28 in the side Walls of the housing to prevent disengagement of the rocker from the housing; and no one of the plates 18 is removed. it will be understood that the pin 27 is applied when the rocker is at one of its extreme positions when the perfo 'ation in the rocker. will he positioned s oe opposite a corresponding perforation in one of the side Walls.

ll claim:

I 1; In a. side hearing, the combination with a housing, of a polygonal shaped rocker loosely seated Within the housing, and co operating means on. said rocker and housing for properly and positively guiding said rocker to normal position after each actuahousing, said rocker having a series of 0p? posed concentric bearing surfaces to thereby maintain the distance between the bolsters or other parts to which the hearing is applied constant, and cooperating meansintegraly formed on said rocker andhousing for properly and positively posltloning said rocker in normal position after each actuation thereof, said meansincluding -a non-circular shaped in rocker adapted to itsmfif act as an eccentrio Weight for the rocker when the latter is displaced and to thereby return the rocker to normal under the influence of gravity.

3. In aside hearing, the combination with a housing, of a rocker loosely mounted Within the housing, the rocker being rovided at each end thereof with substantia. ly triangular shaped lugs having curved sides, and the adjacent Walls of the housing having guiding ledges, the outlinesof which are generated substantially in the manner of a cycloidby said lugs.

l. In a side bearing, the combination with a hollow housin adapted to'be secured to a holster, of a roe (er loosely mounted Within said housing, said rocker having a series of opposed concentric hearing surfaces, the rocker having at eachend thereof a noncircular projecting lug, and the adjacent Walls of the housing being provided with guiding ledges cooperable with said lugs to positively determine the position of the rocker.

lln witness that l claim the' foregoing have hereunto subscribed my name this 15th day of Feb, 191'! JOHN ll. UCONNOR.

on one end of the- Mill 

